δείτε την πρωτότυπη σελίδα τεκμηρίου
στον ιστότοπο του αποθετηρίου του φορέα για περισσότερες πληροφορίες και για να δείτε όλα τα ψηφιακά αρχεία του τεκμηρίου*
κοινοποιήστε το τεκμήριο



Quantum mechanical tunneling at high energy (EN)

Shaft, Q (EN)
Bachas, C (EN)
Lazarides, G (EN)
Tiktopoulos, G (EN)

N/A (EN)

We study tunneling processes for a quantum mechanical particle in a double-well potential. We show that the instanton estimate of the transition rate between excited states in the two wells is reliable at energies much below the barrier height and weak coupling, in that it is asymptotic to the WKB result. We illustrate how the growth of the amplitude with energy can in a generic basis be perceived as partly due to the growth of available phase space, and we comment on the infrared divergences that appear in the calculation of radiative corrections. We then calculate the rate of tunneling from the ground state in one well to an excited state in the other, induced by an external periodic force, and show that it grows with energy like the geometric mean of the vacuum-to-vacuum and excited-to-excited-state rates. This slower growth is due to the difficulty of converting the energy, initially stored in a single quantum, to large occupation number. We argue by extrapolation that even at energies near the barrier height, induced tunneling should be suppressed by a fraction of the instanton action. (EN)

journalArticle

TEV (EN)
ANOMALIES (EN)
BEHAVIOR (EN)
WEINBERG-SALAM THEORY (EN)
WEAK-INTERACTIONS (EN)
BARYON-NUMBER (EN)
NON-CONSERVATION (EN)
UNIVERSE (EN)
VIOLATION (EN)
BREAKDOWN (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (EN)

1991


ELSEVIER SCIENCE BV (EN)



*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.